KR930011206B1 - Prearrengement method in pabx - Google Patents

Abstract

The PBX system has a buffer means storing the message of the inner subscriber and an operator. The reservation method includes; the first process connecting the operator and the suspended outer subscriber when the message in the buffer means is a release key message; the second process checking the requested inner subscriber status and booking on the reservation table when the line is busy, otherwise connecting two subscribers when the message is the connecting key message; the third process checking the reservation table and connecting the requested subscriber when the line is not busy.

Description

Reservation service method in private exchange

1 is a system configuration to which the present invention is applied.

Figure 2a is a block diagram of a reservation table for performing the present invention.

Figure 2b is a block diagram of a message buffer for performing the present invention.

3 is a message processing flow diagram in accordance with the present invention.

4 is a flow chart of a subscriber message processing according to FIG.

5 is an operator message processing flow chart according to FIG.

* Explanation of symbols for main parts of the drawings

100: local exchange 200: private exchange

STA: Expatriate STB: Extended Subscriber

The present invention relates to a call service method of a private exchange, and more particularly, to a reservation service method for providing a call service when an extension is in a call when an operator wants to connect an incoming call with an extension. will be.

In general, when a CO subscriber calls an extension subscriber of a private exchange, there are two main methods of providing a call service in a private exchange. One is a direct inward dialing (DID) method in which a CO subscriber dials and calls a telephone number of an extension subscriber. The other is a method of receiving a service through an operator of a private exchange. At this time, the main role of the operator is to connect the incoming CO line at the corresponding station, and when the CO line traffic is congested, the operator needs more rapid service.

Conventionally, when there is an incoming CO line, the operator first makes a call with the CO line subscriber, confirms the desired extension subscriber, holds the call of the CO line subscriber, and then checks the call state of the corresponding CO subscriber. At this time, if the extension is free, the call is dialed by dialing the number of the extension. On the other hand, if the extension is busy, the call cannot be connected. The CO subscriber then listens to the music on hold and returns to the operator. Here, the operator provided the service to notify the subscribers of the extension.

1 is a block diagram showing the connection and configuration between the local exchange 100 and the private exchange 200. In FIG. 1, the private exchange stores a central processing unit 10 that performs overall operation control including the exchange function of the private exchange, and a program for performing a control operation of the central processing unit 10. Various signal data under the control of the memory unit 12 for temporarily storing data, the interface circuit 14 for interfacing data input and output between components of the central processing unit 10 and the switch, and the central processing unit 10. And a switching circuit 16 for switching voice data to form a communication path, an internal subscriber circuit 18 for interfacing a call connection during an exchange period of an extension subscriber phone under the control of the central processing unit 10, and a ring signal. A ring generator 20 that generates and supplies the internal subscriber circuit 18 to the internal subscriber circuit 18, and generates and outputs various tone signals to the switching circuit 16 under the control of the central processing unit 10; (22), a trunk line circuit (24) for calibrating a trunk line in a dormant state under the control of the central processing unit (10) to form a trunk line call loop, and interfacing the call connection with the trunk line; A DTMF transmitter 26 for generating a DTMF signal according to the trunk line digit data input from the processing apparatus 10 and outputting the DTMF signal to the switching circuit 16, and a DTMF generated at the subscriber subscriber telephone and received through the switching circuit 16 ( A DTMF receiver 28 that decodes and outputs a Dual Tone Multi-Frequency signal to the central processing unit 10, and a relay station for performing a relay call connection under the control of the central processing unit 10 ( 3) consists of. Since FIG. 1 is a generally known technique, a detailed description of the operation is omitted.

The prior art described above with reference to FIG. 1 is as follows. When the trunk line subscriber (STA) of the national exchange 100 dials the telephone number of the private exchange 200 to make a call with the extension subscriber (STB) of the private exchange 200, the private exchange through the private exchange 100 A call enters the trunk line circuit 24 of the 200 and reaches the relay station 30 through the switching circuit 16. At this time, one lamp of the LPS (loop select) (not shown) of the repeater 30 flashes. LPS is an incoming call response key used by an operator and an outgoing call key.

The operator of repeater 30 then presses the corresponding LPS to answer the incoming call. Accordingly, the CO subscriber and the operator have a call path and are in a call state. In the call state, the operator hears the extension telephone number of the subscriber station STB to which the trunk line subscriber STA wants to call and dials the corresponding extension telephone number. At this time, incoming call of STA is automatically put on hold.

At this time, if it is assumed that the corresponding STB is busy, the operator hears a busy tone. Then, the operator inputs a release key to give up the call with the subscriber station (STB), and then speaks with the subscriber station (STA) again. At this time, the operator informs STA that the corresponding subscriber is currently busy and completes the service.

As described above, in the related art, when a call of the corresponding extension subscriber is not made, there is a cumbersome problem that the trunk line subscriber and the operator need to make a call again. In addition, when the incoming trunks runaway, the quality of service is often worsened.

Accordingly, an object of the present invention is to provide a reservation service method in a private exchange that can improve a call service in view of the above problems.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The system to which the present invention is applied is the same as that of the above-described first diagram, and the reference numerals are the same.

FIG. 2A is a block diagram of a reservation table configured in the memory unit 12 for carrying out the present invention, and includes an area for storing a port number corresponding to each of the plurality of extension subscribers 0 to n of the private exchange 200. It is shown. The port number consists of a highway number and a channel number and has a size of 1 word.

2B is a block diagram of a message buffer configured in the memory unit 12 for the purpose of carrying out the present invention, wherein each message is a message head indicating that the message is a message, a message size indicating the size of the message, and a place where the message is generated. It consists of a message ID, a message type indicating the type of message, a port number indicating the port where the message originated, and the actual message content. The message buffer is a buffer that sequentially stores various messages of subscribers and operators, and uses a FIFO (First In-First Out) memory in the present invention. The types of extension subscriber messages are digits dialed by the subscribers, hook-on / off states, and the like. The types of operator messages are operator key inputs.

3 is a message processing flowchart according to the present invention, which stores operator and extension subscriber messages generated from the extension subscriber circuit 18 and the relay station 30, respectively, in the message buffer of the memory unit 12 and analyzes the stored messages. In the message analysis process, when the message is the subscriber message in the message analysis process, the subscriber message processing process analyzes and processes the event according to the corresponding subscriber message, and the message is the operator message in the message analysis process. It consists of an operator message processing that analyzes and processes the data.

4 is a flow chart of the subscriber message processing of FIG. 3, which is a reservation inspection process and reservation for checking whether a subscriber number is stored in the area of the extension subscriber in the reservation table of the hook-on message temporary memory unit 12; When the port number is stored in the inspection process, the tone generator 22 transmits the tone through the switching circuit 16 to the corresponding port number to be heard by the CO line subscriber and supplies the ring signal of the ring generator 20 to the corresponding station. The reservation call connection process connects the call between the CO line subscriber of the corresponding port number and the corresponding subscriber.

5 is an operator message processing flowchart of FIG. 3, in which an operator message connects a call path between a trunk line subscriber and an operator that is on hold through an operator's release key message temporary switching circuit 16, and an operator message. The call state check process of checking the call state of the corresponding extension subscriber through the operator's connection key message temporary extension circuit 18, and the call state check process from the reservation schedule table to the corresponding subscriber's area. It consists of a port number storage process for storing the port number of the corresponding CO line, and a call connection process for connecting a call line between the CO line and the extension line through the switching circuit 16 when the extension subscriber is not busy in the call state checking process.

Hereinafter, a detailed description will be given with reference to FIGS. 1 to 5 attached to an operation example of the present invention.

First, the operation of the present invention will be described schematically. If there is a trunk line incoming call, the operator wants to connect the trunk line incoming call to an extension subscriber who is in a call, and the operator inputs a connect key while the corresponding trunk line incoming call is suspended. The connection key is a key that the operator enters when connecting the trunk line with the station. The central processing unit 10 of the private exchange 200 then terminates the role of the operator. In response to the input of the connection key, the central processing unit 10 in the reserved subscriber's area in the reserved table as shown in FIG. Save the port number. Thereafter, when the extension of the corresponding subscriber is hooked on, the service connects the call path between the CO subscriber of the port number stored in the reservation table and the corresponding subscriber.

Referring to the operation of the present invention described above in detail. First, the central processing unit 10 of FIG. 1 generates an subscriber subscriber message or an operator message generated from the subscriber subscriber circuit 18 and the relay station 30 and input in the format shown in FIG. 2B in step 3A of FIG. The data is sequentially stored in the message buffer as shown in FIG. 2B of the memory unit 12. In step 3B, the message stored in the message buffer is analyzed to check whether the message is an extension subscriber message in step 3C. If it is an extension message, perform step (3D). If not, in step (3E), it is checked whether the message is an operator message. In this case, if the message is an operator message, step (3F) is performed. If the message is not an operator message, the operation loops to step (3B). In steps (3C) and (3E), it is checked whether the message is an extension subscriber message or an operator message by checking the message ID of the message.

In the above state, if the call originating from the CO trunk subscriber (STA) is introduced into the trunk line circuit 24 of the private exchange 200, the incoming call to the relay station 30 through the switching circuit 16, the operator calls the incoming call. Will respond. Herein, it is assumed that the STB to which the CO subscriber wants to talk is busy. At this time, if the operator inputs a connection key for connecting the call path between the trunk line subscriber (STA) and the station subscriber (STB) of the relay station 30, this corresponds to the operator message, so that the central processing unit 10 (3E) In step 3F, the process of operator message of FIG. 5 is performed. At this time, incoming call of STA is automatically put on hold.

In step (5A) of FIG. 5, if the operator message is a release key message, and performs a release key message, step (5B) is performed. If not, return to (3B), and if the connection key (5D). In steps (5A) and (5C), it is checked whether the message is a release key message by checking the message type in a message having a format as shown in FIG. At this time, since the operator has entered the connection key, perform step (5D) to check whether the corresponding STB is busy. If the STB is not in a call, the call connection is possible. In step 5F, the ring signal of the ring generator 20 is supplied to the STB through the subscriber circuit 18 through the extension subscriber station. When the subscriber STB is hooked-off, the communication line between the trunk line and the extension line is connected through the switching circuit 16, and the process returns to step 3B. As a result, it is possible to make a call between the STA and the STB. Here, the hook-on / off state of the extension subscriber STB is confirmed from the extension subscriber message generated from the extension subscriber circuit 18. In the step (5D), if the corresponding STB is busy, the call connection is not possible. Therefore, in the step (5E), the corresponding subscriber (STB) is connected to the corresponding subscriber in the reservation table as shown in FIG. After storing the port number, that is, the highway number and the channel number, for the incoming call of the trunk line subscriber (STA) in the corresponding area, the process returns to step (3B). At this time, a ringback tone of the tone supplier 22 is heard through the switching circuit 16 to the port of the trunk line subscriber STA of the trunk line circuit 24. As a result, a call to the corresponding subscriber is reserved.

If the operator of the relay station 30 also inputs a release key, it also corresponds to an operator message. Therefore, the CPU 10 performs steps (3A) to (3C) and (3E) to perform the operator in step (3F). Perform message processing. Therefore, when the operator inputs the release key, the operator connects the communication line between the suspended CO subscriber (STA) and the operator of the relay station 30 through the switching circuit 16 in steps (5A) to (5B) and returns. do.

On the other hand, when the STB reserved by the call as described above ends and hooks on, the hook-on information is applied to the central processing unit 10 from the subscriber circuit 18 as an extension subscriber message. . Then, the central processing unit 10 stores and analyzes the subscriber message in the message buffer of FIG. 2b in steps (3A)-(3B) of FIG. 3 and confirms that it is an subscriber message in (3C). Accordingly, the CPU 10 proceeds to step 3D to perform the subscriber message processing of FIG. 4. In step (4A) of FIG. 4, the message type of the subscriber subscriber message is checked to see if it is a hook-on message. At this time, since the STB is hook-on state (4B), the port number is stored in the area corresponding to the hook-on extension STB in the reservation table as shown in FIG. 2A of the memory unit 12 in step 4B. Check for presence. If it is not a hook-on message (3B), the process returns. When the port number is stored in step (4B), in step (4C), the tone of the feeder 22 is supplied to the corresponding port number of the trunk line circuit 24 through the switching circuit 16 to the corresponding subscriber line. And the ring signal of the ring generator 20 is supplied to the corresponding station of the internal subscriber circuit 18 and returns to step (3B). Then, when the STB hooks off, the reserved call is made by connecting the call path between the CO subscriber of the corresponding port number and the corresponding STB.

Therefore, by making a call reservation when the STB desired by the CO subscriber is busy, the call service can be promptly provided when the STB hooks on.

As described above, the present invention can not only improve the call service in the private exchange but also improve the service service of the operator by quickly serving the corresponding incoming call even when the extension subscriber wanting the call is busy. There is an advantage to reduce.

Claims (2)

Memory means having a central processing unit, a reservation table area for storing a reservation port number corresponding to each of a plurality of extension subscribers, a message buffer for storing messages of extension subscribers and operators, a switching circuit, an extension subscriber circuit, And a ring generator, a feeder, a trunk line circuit, and a relay station, the reservation service method comprising: a message analyzing process of storing messages of the subscribers and operators in the message buffer and analyzing the stored messages; In the message analysis process, the message is the release key message of the operator, the relay call connection process for connecting the communication line between the trunk line subscriber and the operator of the pending state through the switching circuit, and the message is connected to the operator in the message analysis process Key message date and time through the extension subscriber circuit A call state checking process of checking a call state of a subscriber, and a port number storing process of storing a port number of a corresponding trunk line in the area of the corresponding extension subscriber in the reservation table when the corresponding subscriber is busy during the call state checking process; A call connection process of connecting a call line between a trunk line and an extension line through the switching circuit when the corresponding subscriber is not busy in the call state checking process; and the message is hooked on by the subscriber in the message analysis process. A reservation check process for checking whether a port number is stored in the extension subscriber's area in the reservation table at a message date and time; Consisting of a reservation call connection process for connecting a call path between extension subscribers Reservation service method in a private exchange characterized in that. 2. The method of claim 1, wherein the reserved call connection process includes supplying a ring tone of the tone supplier to the corresponding port number through the switching circuit to the trunk line subscriber and supplying a ring signal of the ring generator to the corresponding station. A reservation service method in a private exchange, characterized in that the.